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如何快捷地实现分页显示功能？

　来源：asp之家　发布时间：2010-01-01 15:08:00　

标签：分页,asp,功能

也许是这样的。下面我们来推荐一个简单的分页程序，代码和说明见下（两段虚线“-----”间的代码是实现该功能的重要语句）：
chunfeng.asp

' 分页
<％
----------------------------------------------------------------------------------------------------------------------
theScript    = Request.ServerVariables("SCRIPT_NAME")
' 取得当前ASP页面的完整路径
myconnstr    = "driver={SQL Server};server=yourserver;uid=sa;pwd=;database=yourdatabase"
' 构造 SQL 语句
    thePageSize  = 20
' 每页显示的记录数
    uSQL        = "select * from yourtablename "
----------------------------------------------------------------------------------------------------------------------
％>
----------------------------------------------------------------------------------------------------------------------

' 插入分页控制代码
----------------------------------------------------------------------------------------------------------------------
<html>
<head>
<title>精彩春风之分页高手test</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<link rel="stylesheet" href="../default.css" type="text/css">
</head>
                      <!—此处放置我们的HTML代码//-->
                      <table width="100％" border="0" cellspacing="0" cellpadding="0">
                        <tr>
                          <td>
----------------------------------------------------------------------------------------------------------------------


----------------------------------------------------------------------------------------------------------------------
                          </td>
                        </tr>
                      </table>
                      <table width="100％" border="0" cellspacing="0" cellpadding="0">
                        <tr>
                          <td>
----------------------------------------------------------------------------------------------------------------------
    <％ For i = 1 To rs.pagesize ％>
<!—用循环显示本页记录-->
----------------------------------------------------------------------------------------------------------------------
                      
    <％
        rs.MoveNext
        If rs.EOF Then
            Exit For
            rs.close
            conn.close
        End If
    next
    ％>
                          </td>
                        </tr>
                      </table>
</body>
</html>

navigator_init.inc

' 分页控制代码
<％
    theCurrentPageNum    = clng(request("pn"))
    theCurrentRS        = "rs" & theScript
    ' 用页面名字来唯一确定当前一页面使用的 rs,因为不同目录下面可能有名字相同的文件,因此必须使用带完整路径的文件名
    If theCurrentPageNum = 0 Then
        Set conn = Server.CreateObject("ADODB.Connection")
        conn.open myconnstr
        set rs = server.createobject("adodb.recordset")
        rs.open uSQL,conn,1,3
        if rs.recordcount > 0 then
            rs.PageSize            = thePageSize
            rs.AbsolutePage        = 1
            theCurrentPageNum    = 1
            Set Session(theCurrentRS) = rs
        end if
    else
        Set rs = Session(theCurrentRS)
        if rs.recordcount > 0 then
            rs.AbsolutePage    = theCurrentPageNum
        end if
    End If
----------------------------------------------------------------------------------------------------------------------
' 导航条
    href_first    = theScript & "?mo=0&pn=1"
    href_prev    = theScript & "?mo=0&pn=" & (theCurrentPageNum-1)
    href_next    = theScript & "?mo=0&pn=" & (theCurrentPageNum+1)
    href_last    = theScript & "?mo=0&pn=" & rs.pagecount
    strnav_first= "<a href=" & href_first & ">第一页</a>"
    strnav_prev    = "<a href=" & href_prev & ">前一页</a>"
    strnav_next    = "<a href=" & href_next & ">后一页</a>"
    strnav_last    = "<a href=" & href_last & ">最末页</a>"
----------------------------------------------------------------------------------------------------------------------
    if rs.pagecount > 1 then
        ' 在第一页
        if theCurrentPageNum = 1 then
            strnav_first= "第一页"
            strnav_prev = "前一页"
        end if
        '在最末页
        if theCurrentPageNum = rs.pagecount then
            strnav_next = "后一页"
            strnav_last = "最末页"
        end if
    else
        strnav_first= "第一页"
        strnav_prev = "前一页"
        strnav_next = "后一页"
        strnav_last = "最末页"
    end if
    strnav = strnav_first & " " & strnav_prev & " " & strnav_next & " " & strnav_last
    theRsCount = rs.recordcount
' 由于在 listrecords 函数中,显示完所有记录时将关闭rs,因此要先把rs.recordcount保存起来
％>

navigator.inc

' 分页导航
<table width="300" border="0" align="right" cellpadding="0" cellspacing="0" height="30">
  <form action="<％=theScript％>" method="post" name="form_nav" onsubmit="javascript:return checkpn(this);">
    <tr>
      <td align="right">
            <％=rs.recordcount％> 条 <％=rs.pagecount％>页第<input type="text" name="pn" value="<％
=theCurrentPageNum％>" size=2 maxlength=4 class="form_text_underline">页　<％= strnav ％>
      </td>
    </tr>
  </form>
</table>
<script language="javascript">
// 判断用户输入的页码是否合法
function checkpn(form)
{
    pn = form.pn ;
    if (pn.value=="")
        { alert("请输入页码") ;pn.select();return false;}
    if (!uisNum(pn.value))
        { alert("页码是数字") ;pn.select();return false;}
    if (pn.value-<％=rs.pagecount％>>0)
        { alert("页码不能大于<％=rs.pagecount％>") ;pn.select();return false;}

    return true;
}
function aLength(str)
{
  var i,len;
  len=0;
  for(i=0;i<str.length;i++)
  {
    if(str.charCodeAt(i) > 255)
      len++;
    len++;
  }
  return len;
}
function trimString(str)
{
  var i,j;
  if(str == "") return "";
  for(i=0;i<str.length;i++)
    if(str.charAt(i) != ' ') break;
  if(i >= str.length) return "";
  for(j=str.length-1;j>=0;j--)
    if(str.charAt(j) != ' ') break;
  return str.substring(i,j+1);
}
function uisNum(str)
{
  var i, cChar;
    str = trimString(str);
  for(i=0;i<str.length;i++)
  {
    cChar = str.charAt(i);
    if( !(("0"<=cChar) && (cChar<="9")) )
      return false;
  }
  return true;
}
</script>

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如何快捷地实现分页显示功能？

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